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Message: <blockquote data-quote="westgl" data-source="post: 98120" data-attributes="member: 2025">What I did to get the proper amount of twist was:1. Cut the alum. tube for the 2ea cyl. that are straight shots and get them mounted and in place this will show you your spacing and keep in mind that some spacing is required between the carb inlet and frame.2. Mount the 2ea oem manifolds, that are straight shots already from factory (cyl.'s #2, & #3) with the tubing you just cut, you can leave the hardware a little loose.3. Cut your manifolds above the mounting section, about 1/4" this should be a straight cut, then de-burr with a file, inside and out.4. Put the top half on to the mounted lower half of cut manifold, now point Centerline of oem manifold to centerline of Plenum outlet, mark with a sharpie, three lines center line shaped like a Romain Numeral I that is your center line.5. Take to a fabricator/welder, ask for price up front. My welder put the rubber in a water pan, while he was welding to keep the rubber cool.If the rubber was damaged while welding, I had Plan#BIn case someone has the rubber damaged on those 2ea manifolds, I was going to remove the rubber completely, then weld the tube directly to the Oem Manifold, this would eliminate this clamp point here.</blockquote>